138 def iter_importer_modules(importer, prefix=''):  argument
139     if not hasattr(importer, 'iter_modules'):
141     return importer.iter_modules(prefix)
145 def _iter_file_finder_modules(importer, prefix=''):  argument
146     if importer.path is None or not os.path.isdir(importer.path):
152         filenames = os.listdir(importer.path)
163         path = os.path.join(importer.path, fn)
372     def iter_zipimport_modules(importer, prefix=''):  argument
373         dirlist = sorted(zipimport._zip_directory_cache[importer.archive])
374         _prefix = importer.prefix
416         importer = sys.path_importer_cache[path_item]
420                 importer = path_hook(path_item)
421                 sys.path_importer_cache.setdefault(path_item, importer)
426             importer = None
427     return importer